1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1993 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National Sta
4、ndardJ1863REAF.NOV93Issued 1987-04Reaffirmed 1993-11Superseding J1863 APR87COACH JOINT FRACTURE TESTForewordThis Reaffirmed Document has not changed other than to put it into the new SAE Technical StandardsBoard Format.1. ScopeThis SAE Recommended Practice defines a procedure for determining the cle
5、avage strength of anadhesive used for bonding automotive oily metal substrates.2. References2.1 Applicable PublicationThe following publication forms a part of this specification to the extent specifiedherein.2.1.1 ASTM PUBLICATIONAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 194
6、28-2959.ASTM D 1002Test Method for Strength Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal)3. Test Substrates3.1 SubstratesMetal composition and roughness as specified.3.2 DimensionsMetal substrates shall be cut into flat coupons 25.4 mm x 100 mm at 0.8 mm nominalthickness, unle
7、ss otherwise specified. Coupons shall be free from burrs or other surface imperfections. Formcoupon to geometry shown in Figure 1.3.3 Surface PreparationRemove contaminant from test coupon surface using a neutral solvent such asacetone or methyl ethyl ketone. Apply a uniform 0.025 mm wet thickness c
8、oating of light mineral oil over testcoupons, unless otherwise specified. Condition coupons at 23 C 2 C and 50% 5% humidity for 1 hminimum before bonding.4. Preparation of Test Joints4.1 Joint GeometryJoint geometry will be as shown in Figure 1.SAE J1863 Reaffirmed NOV93-2-FIGURE 1COACH JOINT FRACTU
9、RE SPECIMEN4.2 Adhesive Bondline ThicknessEvaluate adhesive bondline thickness at 0.25 mm and 0.8 mm. Bondlinethickness can be controlled by inserting wire or glass bead spacers into the adhesive. The spacer volume shallnot exceed 1% of the total adhesive volume.4.3 Adhesive ApplicationThe quantity
10、of adhesive used to prepare the bond should be regulated to avoidexcess squeeze-out. Squeeze-out at the edges of the bond shall be removed prior to curing.4.4 Clamping and FixturingBonding surfaces shall be firmly fixed and retained through cure cycle.4.5 Adhesive CureAdhesive shall be cured in acco
11、rdance with the adhesive suppliers or automotive engineersrecommendation.4.6 ConditioningBonded specimens shall be allowed to return to ambient temperatures for 1 h minimum prior totesting.5. Testing5.1 ApparatusTest apparatus as described in ASTM D 1002.5.2 Sample ClampingThe distance between clamp
12、ing jaws shall be 100 mm with each jaw grasping 25 mmminimum of test specimens.5.3 Test RateSpecimens shall be tested at a pull rate of 13 mm/min.5.4 Test QuantityA minimum of five sample lap shears shall be prepared for each test condition.SAE J1863 Reaffirmed NOV93-3-6. Report Results6.1 Report ea
13、ch individual peak load values, sample average, and standard deviation. Bond values shall bereported as the peak load (N) per 25.4 mm sample width.6.2 Report composition, roughness, and thickness of substrate.6.3 Report adhesive bondline thickness.6.4 Report metal preparation materials and thickness
14、 applied.6.5 Report mode of failure (adhesive, cohesive, or substrate failure).6.6 Report adhesive cure schedule (time and temperature).PREPARED BY THE SAE MATERIALS JOINING COMMITTEESAE J1863 Reaffirmed NOV93RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.Applicat
15、ionThis SAE Recommended Practice defines a procedure for determining the cleavage strength ofan adhesive used for bonding automotive oily metal substrates.Reference SectionASTM D 1002Test Method for Strength Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal)Developed by the SAE Materials Joining Committee
